CVE-2021-46355:OCS Inventory 2.9.1 is vulnerable to Stored Cross-Site Scripting (XSS) through device name manipulation.

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OCS Inventory 2.9.1 contains a stored Cross-Site Scripting (XSS) vulnerability that can be exploited by manipulating device names on a computer. An attacker can replace legitimate device names, such as printers, with malicious JavaScript code. When this information is collected by OCS Inventory and displayed in the management interface, the malicious code executes in the browser of administrators or users viewing the inventory data. This vulnerability allows attackers to potentially steal session information, credentials, or perform unauthorized actions on behalf of the victim.

Overview

This vulnerability (CVE-2021-46355) affects OCS Inventory version 2.9.1. The issue stems from inadequate input validation and output encoding when handling device names in the inventory system. OCS Inventory is a popular open-source inventory management solution used by many organizations to track IT assets. The vulnerability is classified as CWE-79 (Cross-site Scripting), specifically a stored XSS variant where malicious code persists in the application's database. The attack vector requires the attacker to have the ability to manipulate device names on systems being inventoried, which could be achieved through various means depending on the environment.

Remediation

To address this vulnerability, organizations should:

  1. Upgrade to the latest version of OCS Inventory that contains fixes for this vulnerability.
  2. If immediate upgrading is not possible, implement additional input validation and output encoding at the application level.
  3. Consider implementing Content Security Policy (CSP) headers to mitigate the impact of XSS attacks.
  4. Restrict access to the OCS Inventory management interface to only authorized personnel.
  5. Monitor for suspicious device names in inventory reports that may contain script tags or other potentially malicious content.
  6. Regularly audit device naming conventions across your organization to prevent manipulation.

References

  1. Detailed analysis of the vulnerability: https://medium.com/@windsormoreira/ocs-inventory-2-9-1-cross-site-scripting-xss-cve-2021-46355-a88d72606b7e
  2. OCS Inventory official website: http://ocs.com
  3. Common Weakness Enumeration (CWE-79): https://cwe.mitre.org/data/definitions/79.html
  4. OWASP XSS Prevention Cheat Sheet: https://cheatsheetseries.owasp.org/cheatsheets/Cross_Site_Scripting_Prevention_Cheat_Sheet.html

Industry ExposureMost to least
This section illustrates the prevalence of a specific Common Vulnerabilities and Exposures (CVE) across various industries based on customer reports. The ranking displays industries from the most to least affected by this particular vulnerability, offering valuable insight into where this CVE has been most frequently observed. This information can help organizations within these sectors prioritize their security efforts, understand their relative risk exposure compared to their peers, and focus remediation strategies where they are most needed. By understanding the industry-specific impact, organizations can make more informed decisions regarding patching, resource allocation, and overall risk management related to this CVE.

  1. Accommodation & Food Services: Low
    Accommodation & Food Services
  2. Administrative, Support, Waste Management & Remediation Services: Low
    Administrative, Support, Waste Management & Remediation Services
  3. Agriculture, Forestry Fishing & Hunting: Low
    Agriculture, Forestry Fishing & Hunting
  4. Arts, Entertainment & Recreation: Low
    Arts, Entertainment & Recreation
  5. Construction: Low
    Construction
  6. Educational Services: Low
    Educational Services
  7. Finance and Insurance: Low
    Finance and Insurance
  8. Health Care & Social Assistance: Low
    Health Care & Social Assistance
  9. Information: Low
    Information
  10. Management of Companies & Enterprises: Low
    Management of Companies & Enterprises
  11. Manufacturing: Low
    Manufacturing
  12. Mining: Low
    Mining
  13. Other Services (except Public Administration): Low
    Other Services (except Public Administration)
  14. Professional, Scientific, & Technical Services: Low
    Professional, Scientific, & Technical Services
  15. Public Administration: Low
    Public Administration
  16. Real Estate Rental & Leasing: Low
    Real Estate Rental & Leasing
  17. Retail Trade: Low
    Retail Trade
  18. Transportation & Warehousing: Low
    Transportation & Warehousing
  19. Utilities: Low
    Utilities
  20. Wholesale Trade: Low
    Wholesale Trade

Focus on What Matters

  1. See Everything.
  2. Identify True Risk.
  3. Proactively Mitigate Threats.

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